c++  -O2 -pipe -fno-omit-frame-pointer -fno-strict-aliasing    -o xplanet Map.o Options.o  PlanetProperties.o Ring.o Satellite.o  Separation.o View.o buildPlanetMap.o  createMap.o drawMultipleBodies.o  drawProjection.o findBodyXYZ.o  findFile.o getopt.o getopt1.o  parse.o parseColor.o printVersion.o  readConfig.o readOriginFile.o ssec.o  setPositions.o sphericalToPixel.o  xpUtil.o xplanet.o  libannotate/libannotate.a             libdisplay/libdisplay.a                 libdisplay/libtimer.a                   libephemeris/libephemeris.a             libephemeris/libmoons/libmoons.a        libimage/libimage.a                     libmultiple/libmultiple.a               libplanet/libplanet.a                   libprojection/libprojection.a           libsgp4sdp4/libsgp4sdp4.a               -lgif  -L/usr/local/lib -R/usr/local/lib -lX11 -ljpeg -lpng -lm -lz -lnetpbm -ltiff -lm   -L/usr/local/lib -R/usr/local/lib -lX11       -lXss -lXext -L/usr/local/lib -lfreetype -lz -lbz2 -pthread -L/usr/lo
 cal/lib -lpangoft2-1.0 -lpango-1.0 -lm -lfreetype -lfontconfig -lgobject-2.0 -lgmodule-2.0 -lgthread-2.0 -lglib-2.0        -liconv -lcharset -L/usr/local/lib -R/usr/local/lib -lX11 -L/usr/local/lib -lm
 
libimage/libimage.a(gif.o)(.text+0xfc): In function `write_gif':
 
: undefined reference to `QuantizeBuffer'
 
libimage/libimage.a(gif.o)(.text+0x1a8): In function `write_gif':
 
: undefined reference to `PrintGifError'
 
libimage/libimage.a(gif.o)(.text+0x20e): In function `write_gif':
 
: undefined reference to `PrintGifError'
 
libimage/libimage.a(gif.o)(.text+0x3dd): In function `read_gif':
 
: undefined reference to `PrintGifError'
 
libimage/libimage.a(gif.o)(.text+0x513): In function `read_gif':
 
: undefined reference to `PrintGifError'
 
*** Error code 1
 
 
 
Stop in /usr/ports/astro/xplanet/work/xplanet-1.3.0/src.
 
*** Error code 1
 
 
 
Stop in /usr/ports/astro/xplanet/work/xplanet-1.3.0/src.
 
*** Error code 1
 
 
 
Stop in /usr/ports/astro/xplanet/work/xplanet-1.3.0.
 
*** Error code 1
 
 
 
Stop in /usr/ports/astro/xplanet/work/xplanet-1.3.0.
 
*** Error code 1
 
 
 
Stop in /usr/ports/astro/xplanet.
 
*** Error code 1
 
 
 
Stop in /usr/ports/astro/xplanet.

How-To-Repeat: install astro/xplanet, which is part of misc/kdeedu4 meta-port.